/*
 * Copyright (c) 2011 Oracle
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 **/

package org.sunspotworld.airstore.util;

import java.util.Vector;
import org.sunspotworld.airstore.AirStore;
import org.sunspotworld.airstore.IAirStoreListener;
import org.sunspotworld.airstore.records.Record;
import org.sunspotworld.airstore.records.RecordTemplate;

/**
 *
 * @author randy
 */
public class Waiter implements IAirStoreListener {

    RecordTemplate rt;
    boolean isReady = false;

    public void notifyPut(Record r) {
        isReady = true;
        synchronized(this){ notifyAll();}
        AirStore.removeListener(this, rt);
    }

    public void notifyTake(Record r) {
    }

    public void notifyReplace(Record out, Record in) {
        isReady = true;
        synchronized(this){ notifyAll();}
        AirStore.removeListener(this, rt);
    }

    public Vector waitFor(RecordTemplate templ){
        rt = templ;
        Vector v = AirStore.getAllMatches(rt);
        if(v.isEmpty()){
            AirStore.addListener(this, rt);
            //The following 9 lines are the advertised way to say "this.wait()";
            synchronized(this){
                while(!isReady){
                    try {
                        wait();
                    } catch (InterruptedException ex) {
                        ex.printStackTrace();
                    }
                }
            }
        }
        return v;
    }
}
